Proto-Romanish (also known as "Common Romanish" - romenească comună or "Ancient Romanish" - străromenească) is a hypothetical and unattested Romantish language evolved from Vulgar Romantian and considered to have been spoken by the ancestors of today's Garlians before ca. 400 AD, being the first known language that split from Vulgar Romantian.
In the 9th century, Proto-Romanish already had a structure very distinct from the other Romantish languages, with major differences in grammar, morphology and phonology. At this point, it is considered to be identical with today's Garlian language. In the 11th century, Proto-Romanish has been implemented in Romany, where it achieved a significant amount of loans from Romano-Slevic, as well as Eganian and Turquese.
According to the Romanish theory, Proto-Romanish (Garlian), evolved into the following modern language and its dialects:
- Romanish language (sometimes called Antharo-Romanish to distinguish it from the rest of the Romanish languages)
- Aromanish (sometimes called Ispelo-Romanish)
- Egano-Romanish (also known as Vallaquian)
The first language that broke the unity with Romanish was Aromanish, in the 12th century, followed shortly after by Egano-Romanish. Maldavian was the last to break the link with Antharo-Romanish in the 14th century.